This is new and unused from a camping supplier that went out of business, taken from their unsold stock, not in retail packaging.  I have attached several photos of the actual zipper assembly.   This is a little over 12 feet long, and is designed for Woods Connection Series Tents, but it looks like it could be used to connect many different screenhouses, assuming they use the same heady duty zipper. I can only guarantee that it will fit the Woods Series tents, as the manual states.